uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/servers/mail/opensmtpd/extras.nix

@@ -0,0 +1,83 @@
+{ lib, stdenv, fetchurl, openssl, libevent, libasr, ncurses,
+  pkg-config, lua5, perl, libmysqlclient, postgresql, sqlite, hiredis,
+  enableLua ? true,
+  enablePerl ? true,
+  enableMysql ? true,
+  enablePostgres ? true,
+  enableSqlite ? true,
+  enableRedis ? true,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "opensmtpd-extras";
+  version = "6.7.1";
+
+  src = fetchurl {
+    url = "https://www.opensmtpd.org/archives/${pname}-${version}.tar.gz";
+    sha256 = "1b1mx71bvmv92lbm08wr2p60g3qhikvv3n15zsr6dcwbk9aqahzq";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ openssl libevent
+    libasr lua5 perl libmysqlclient postgresql sqlite hiredis ];
+
+  configureFlags = [
+    "--sysconfdir=/etc"
+    "--localstatedir=/var"
+    "--with-privsep-user=smtpd"
+    "--with-libevent-dir=${libevent.dev}"
+
+    "--with-filter-clamav"
+    "--with-filter-dkim-signer"
+    "--with-filter-dnsbl"
+    "--with-filter-monkey"
+    "--with-filter-pause"
+    "--with-filter-regex"
+    "--with-filter-spamassassin"
+    "--with-filter-stub"
+    "--with-filter-trace"
+    "--with-filter-void"
+    "--with-queue-null"
+    "--with-queue-ram"
+    "--with-queue-stub"
+    "--with-table-ldap"
+    "--with-table-socketmap"
+    "--with-table-passwd"
+    "--with-table-stub"
+    "--with-scheduler-ram"
+    "--with-scheduler-stub"
+
+  ] ++ lib.optionals enableLua [
+    "--with-lua=${pkg-config}"
+    "--with-filter-lua"
+
+  ] ++ lib.optionals enablePerl [
+    "--with-perl=${perl}"
+    "--with-filter-perl"
+
+  ] ++ lib.optionals enableMysql [
+    "--with-table-mysql"
+
+  ] ++ lib.optionals enablePostgres [
+    "--with-table-postgres"
+
+  ] ++ lib.optionals enableSqlite [
+    "--with-table-sqlite"
+
+  ] ++ lib.optionals enableRedis [
+    "--with-table-redis"
+  ];
+
+  NIX_CFLAGS_COMPILE = lib.optionalString enableRedis
+      "-I${hiredis}/include/hiredis -lhiredis"
+    + lib.optionalString enableMysql
+      " -L${libmysqlclient}/lib/mysql";
+
+  meta = with lib; {
+    homepage = "https://www.opensmtpd.org/";
+    description = "Extra plugins for the OpenSMTPD mail server";
+    license = licenses.isc;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ gebner ekleog ];
+  };
+}